2 câu trả lời
$48.x-x+35.x=7900$
$48.x-x.1+35.x=7900$
$x.(48-1+35)=7900$
$x.82=7900$
$x=7900:82$
$x=\frac{3950}{41}$
Đáp án:
`48 . x - x + 35 . x = 7900`
`48 . x - x . 1 + 35 . 1 = 7900`
`x . (48 - 1 + 35) = 7900`
`x . 82 = 7900 `
` x = 7900 : 82`
`x =` `\frac{3950}{41}`